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Statement of Cash Flows - Summary of Adjustments to Reconcile Net Income to Cash (Detail) - SEK (kr) kr in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure Of Adjustments To Reconcile Net Income To Cash [Line Items] |  |  |
Depreciations | kr 3,861 | kr 4,272 | kr 4,114
Impairment losses | 282 | 662 | 274
Adjustments to reconcile net income to cash | 30,617 | 51,710 | 17,638
Depreciations | 2,179 | 2,427 | 2,451
Impairment losses | 99 | 154 | 66
Amortizations | 3,980 | 4,458 | 3,577
Goodwill | 1,260 | 31,897 | 0
Total impairments | 15,333 | 31,916 | 61
Total depreciation, amortization and impairment losses on property, plant and equipment and intangible assets | 25,734 | 43,889 | 10,543
Taxes | 2,540 | 3,189 | 5,383
Dividends from associates | 111 | 46 | 58
Undistributed earnings in associates | 348 | (104) | (3)
Gains/losses on investments and sale of operations, intangible assets and PP&E, net | 153 | 268 | (287)
Other non-cash items | 1,731 | 4,422 | 1,944
Right-of-use assets [member] |  |  |
Disclosure Of Adjustments To Reconcile Net Income To Cash [Line Items] |  |  |
Adjustments to reconcile net income to cash | 2,278 | 2,581 | 2,517
Intangible asset and goodwill [member] |  |  |
Disclosure Of Adjustments To Reconcile Net Income To Cash [Line Items] |  |  |
Adjustments to reconcile net income to cash | 19,313 | 36,374 | 3,638
Property, plant and equipments [member] |  |  |
Disclosure Of Adjustments To Reconcile Net Income To Cash [Line Items] |  |  |
Adjustments to reconcile net income to cash | 4,143 | 4,934 | 4,388
Capitalized development expenditure [member] |  |  |
Disclosure Of Adjustments To Reconcile Net Income To Cash [Line Items] |  |  |
Amortizations | 1,480 | 1,137 | 1,586
Customer relationships, IPRs and other intangible assets [member] |  |  |
Disclosure Of Adjustments To Reconcile Net Income To Cash [Line Items] |  |  |
Amortizations | 2,500 | 3,321 | 1,991
Impairments | kr 14,073 | kr 19 | kr 61

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